<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <link rel="" type="" href="">
    <style>
        * {
            padding: 0;
            margin: 0;
        }

        ul {
            width: 190px;
            display: inline-block;
            background-color: #CCC;
            padding: 10px;
            text-align: center;
        }

        li {
            display: inline-block;
            background-color: #999;
            width: 60px;
            margin-bottom: 10px;
            color: #EEE;
        }

        .box {
            background-color: #666;
            height: 48px;
            text-align: left;
        }
    </style>
</head>

<body>
    <div id="box">
        <ul>
            <li>
                <div>1</div>
                <div>Jan</div>
            </li>
            <li>
                <div>2</div>
                <div>Jan</div>
            </li>
            <li>
                <div>3</div>
                <div>Jan</div>
            </li>
            <li>
                <div>4</div>
                <div>Jan</div>
            </li>
            <li>
                <div>5</div>
                <div>Jan</div>
            </li>
            <li>
                <div>6</div>
                <div>Jan</div>
            </li>
            <li>
                <div>7</div>
                <div>Jan</div>
            </li>
            <li>
                <div>8</div>
                <div>Jan</div>
            </li>
            <li>
                <div>9</div>
                <div>Jan</div>
            </li>
            <li>
                <div>10</div>
                <div>Jan</div>
            </li>
            <li>
                <div>11</div>
                <div>Jan</div>
            </li>
            <li>
                <div>12</div>
                <div>Jan</div>
            </li>
            <div class='box'>

            </div>
        </ul>

    </div>
    <script src="./lib/jquery.min.js"></script>
    <script>
        $(function () {
            $('li').click(function () {
                var txt = $(this).children('div').eq(0).text();
                $('.box').text(txt+'月份好!');
            })
        })
    </script>
</body>

</html>